Calculations involving heat load of people takes into consideration heat due to _____ and _____.

The correct choice focuses on the concept of heat load calculations concerning occupants in a space. Heat load from people primarily consists of both latent heat and sensible heat.

Sensible heat refers to the heat that can be sensed or measured with a thermometer, which is the temperature increase associated with the thermal energy added to a space. This includes the heat produced by the metabolic processes of individuals, as they generate thermal energy through activities such as movement, speaking, or any physical exertion.

On the other hand, latent heat pertains to the heat associated with moisture in the air, which can occur from the perspiration of individuals. When people sweat, they release moisture into the environment. This evaporation of sweat requires energy, often referred to as latent heat, which contributes to the total heat load in the indoor climate.

Taking both forms of heat into account is crucial for HVAC calculations, as the machine must manage not only the temperature but also humidity levels to maintain a comfortable indoor environment.